

/*
 * @description: 
 * @version: 1.0.1
 * @Author: xuqiulin
 * @Date: 2021-06-08 10:25:38
 * @LastEditors: Please set LastEditors
 * @LastEditTime: 2021-06-08 10:55:47
 */
let key = "1_47_2";
let ka = key.split("_").map(i => Number(i));
for (let item of ka) {
    console.log(item, typeof(item));
}